Wiktionary
a. mass-to-energy n. 1 (context physics English) mass and energy as a unified concept. 2 (also spelled mass energy) The energy associated with any given mass according to special relativity, E=mc².
Wikipedia
- redirect Mass–energy equivalence
Usage examples of "mass-energy".
A basic mass-energy converter that differed only in the gift of locomotion from a blade of grass, a tree, a blueberry bush.
They flash into a brief existence, bankrolled by borrowed mass-energy, then disappear as the law of conservation of energy reasserts itself.
No physical laws are violated, as the conservation of mass-energy is balanced at a higher level.
Hunt voiced their reactions by asking how some of the fundamental laws of physics-conservation of mass-energy and momentum, for example-could be reconciled with the notion of particles being able to vanish spontaneously whenever they chose.
There is the question of the true nature of Reality, the question of the conservation of mass-energy during Reality Change and so on.
But the sword, gunpowder, steam, even the hydrogen bomb, all these were as nothing before the mass-energy converter.
I saw a discontinuity in the mathematical model of the aspect of mass-energy called inertia.
Then there are certain developments in nuclear chemistry that seem to deny the law of conservation of mass-energy.